ipv4: prevent potential spectre v1 gadget in ip_metrics_convert()

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[ Upstream commit 1d1d63b612 ]

if (!type)
		continue;
	if (type > RTAX_MAX)
		return -EINVAL;
	...
	metrics[type - 1] = val;

@type being used as an array index, we need to prevent
cpu speculation or risk leaking kernel memory content.

Fixes: 6cf9dfd3bd ("net: fib: move metrics parsing to a helper")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230120133040.3623463-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Eric Dumazet 2023-01-20 13:30:40 +00:00 • committed by Greg Kroah-Hartman

parent da553c7ca8

commit 6850fe301d

1 changed files with 2 additions and 0 deletions

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net/ipv4/metrics.c

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